Improvement in tenoning-machine



N. PEIERS, PnoTmuTnoamPHEn. WASHINGTON. u. c.

dimmi tate @anni idtire,

SENECA M. RTCHARDSON, OF WORCESTER, MASSACHUSETTS.

` Leners Patent No. 89,245, camz April 2o, 1869.

IMPROVEMENT IN TENONING-MACHINE.

The Schedule referred to n -these Lettera Patent and making part of thesame.

county of Worcester, and Commonwealth ofMassaJ ehusetts, have inventedcertain new and`useful Improvements in Tenoning-Machines; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being' had to the accompanyingdrawings, forming a part of this specication, in which- Figure lrepresents a front view of my improved tenoning-machine;

Figure 2 represents a plan view of said machine; and

Figure 3 represents a view of the left-hand end of the same.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will proceed to describe it more in detail.

The nature of my invention consists- First, in the combination, with theelevating-frame of an adjustable frame for supporting the arbor orjournal, ofthe upper cutter-head, as and for the purposes hereinafterexplained.

Second, in the combination, with the main frame of a tenoning-maehine,of a peculiarly constructed elevating-trame, for supporting the uppercutter-head, as hereinafter described.

In the drawings, the part marked A is the main frame;

B, the driving-shaft; and

C, the driving-pulley.

1) is the lower cutter-head, and

E, the upper cutter-head, both of which are provided with knives andmounted on arbors a and b in the usual manner.

The arbor a, of the lower cutter-headpD is snppolted by adjustablebearings, c,upon the main frame A, while the arbor b of the uppercutter-head E is supported by socket or other bearings, f f, arranged inthe hangers d cl, that project downward from the adjustable frame F, asindicated in the drawings.

The adjustable frame F is tted in recesses at the under side of theelevating frame G, and is provided with slot e, through 'which passscrews or bolts, g g, by means of which it is secured to theelevatingframe G.

The frame F is turned up at one end, h, to form a bearing to receive theneck or smooth part of the regulating-screw H, the end of said screwworking in the side of the elevating-frame G.

Screw H is for the purpose of adjusting the frame y F longitudinally,which can be effected in a very convenient manner by simply looseningthe screws or bolts g g, and then turning' the adjusting-screw H to movethe frame F in or out, as the case may be, to bring the cutter-head Einto the proper relativeposition as respects the lower cutter l). v

Screw H is provided with a collar, m, which bears against the projectionh and insures the movement of the frame F.

The ordinaly mode of supporting the arbor l) of the cutter-head E hasbeen by securing its bearings independent of each other tothe under sideof the elevating-frame G, and with such an arrangement it is verydiiicult to adjust the cutter-head E to the proper position, each of thebearings requiring separate adjustment.

There is great liability of throwing the first adjusted out of placewhile adjusting the other. Besides, it is difieult with such anarrangement to secure the exact adjustment without great inconvenienee,the vbearings requiring to be hammered or' rapped back and forth severaltimes before any degrec of accuracy can be obtained, whereas, by myimprovement, frame F can be adjusted back and forth with precision, asbefore explained.

It will thus be seen that my improved machine is capable of producingmore accurate and perfect Work than the machines constructed in theordinary manner.

The elevating-frame G, as heretofore constructed, has been of the samewidth at the front as; at the back, which, in practice, has been foundto interfere. very much with the proper operation of the machine by theattendant, since the front right-hand corner of the frame interferedwith him while adjusting the homing-lever 1,by which the work is heldupon the sliding-table K, and also obstructed a direct view of thecutter-heads.

The left-hand corner of the frame also, interfered with the ready andconvenient adj ustment of the binder of the driving-belt M.

All of the foregoing objections are overcome and obviated by my improvedelevating-frame, the front of which is made in the form shown in fig. 2.

The sides N N are curved .in-in front of the frame F, and then projectforward vparallel to each other.

In addition to the advantages above enumerated, the frame is rendered`stronger and less liable to spring or tremblein the centre, where frameF is supported.

A detailed description of the entire machine is not deemed necessary, asmost of the parts, and the operation of the same, do not differmaterially from machines in common use. a

Having described my improved tenoning-machine,

What I claim therein as new, and of my invention, and desire to secureby Letters Patent, is-

l. The combination of frame F with frame G, substantially as and for thepurposes set forth.

2. The combination, with frames F and G, of the adjusting-screw H, saidparts being constructed and arranged in relation to eachother,substantially as and for the purposes set forth.

3. The elevating-frame G, constructed as described,

and as shown in the accompanying drawings,for the purposes stated.

SENECA M. RICHARDSON. Witnesses:

Trios. H. Denen, D. L. MILLER.

